Error - This version of Visual Studio is unable to open the following projects

Question

I have installed Python package for VS.NET 2013 from the VS itself. After that i could not open any C++ Project. I got this Error Message:

Full Text:

Unsupported

This version of Visual Studio is unable to open the following projects.vcxproj The project types may not be installed or this version of Visual Studio may not support them. For more information on enabling these project types or otherwise migrating your assets, please see the details in the "Migration Report" displayed after clicking OK.

 - PROJECT_NAME, "C:\xx\xx\xx\xx\xx\PROJECT_NAME.vcxproj"

Non-functional changes required

Visual Studio will automatically make non-functional changes to the following projects in order to enable them to open in Visual Studio 2013, Visual Studio 2012, and Visual Studio 2010 SP1. Project behavior will not be impacted. - ImageRegistrationEngine, "C:\xx\xx\xx\xx\PROJECT_NAME.sln"

EDIT:

The project was created on the same machine using the exactly same version of VS.NET..

BTW, I still can open C# projects but not C++ ones.

Answer 1

The accepted answer in this question solved my problem.

vs2012 error: package 'visual c++ package' failed to load

I opened Developer Command Prompt for VS2013 and write devenv /Setup (while VS is closed). Then, I started VS again and everything was alright.

Answer 2

Opened Developer Command Prompt for VS2013 in administrator mode and executed devenv /Setup (while VS is closed). Then VS started working as expected.